Abusing statistics:

“Mr. Wansink’s fall from grace began with a 2016 blog post in which he blithely confessed to using improper research techniques known as p-hacking and HARKing. P-hacking involves running statistical analyses until they produce a statistically significant result; HARKing stands for “hypothesizing after the results are known.” The post prompted a small group of skeptics to take a hard look at Mr. Wansink’s past scholarship. Their analysis, published in January 2017, turned up an astonishing variety and quantity of errors in his statistical procedures and data.”